The
Corpus Inscriptionum Latinarum is a behemoth publication spanning 17 volumes
in about 70 parts that record about 180,000 Latin inscriptions from Roman
times, ranging from official scripts to lowly graffiti hastily etched
on the walls of toilets and brothels.

Graffiti from Pompeii has culled some of the juiciest morsels, showing
us that, indeed, the art of graffiti is a lost one:

V.5 (just outside the Vesuvius gate); 6641: Defecator, may everything
turn out okay so that you can leave this place

I.2.20 (Bar/Brothel of Innulus and Papilio); 3932: Weep, you girls.
My penis has given you up. Now it penetrates men’s behinds. Goodbye,
wondrous femininity!

VIII.2 (in the basilica); 1820: Chie, I hope your hemorrhoids rub
together so much that they hurt worse than when they every have before!